The new technique we proposed in this paper based on Hidden Markov Model in the field of post compression rate distortion algorithms certainly meet the requirements of high quality still images. The existing technology has been extensively applied in modern image processing. Development of image compression algorithms is becoming increasingly important for obtaining a more informative image from several source images captured by different modes of imaging systems or multiple sensors. The JPEG... Topics: JPEG 2000, Hidden Markov Model, Rate distortion, Scalability, Image compression, post compression
In the recent technology advances, an increasing number of users are accessing various information systems via wireless communication. The majority users in a mobile environment are moving and accessing wireless services for the activities they are currently unavailable inside. We propose the idea of complex activity for characterizing the continuously changing complex behavior patterns of mobile users. For the purpose of data management, a complex activity is copy as a sequence of location... Topics: Activity mining, Prefectching, pushing, proactive data management, Genetic Algorithm
Humans are able to process a face in a variety of ways to categorize it by its identity, along with a number of other demographic characteristics, including race, gender , and age. Experimental results are based on a face database containing subjects. Race and gender also play an important role in face-related applications. Experimental results are indicated that participants categorized the race of the face and this categorization drives the perceptual process. A face image data set is... Topics: race identification, PCA, face recognition
Modern Enterprise Software Systems entail many challenges such as rapidly changing business scenario, increase in complexity, and shorter time to market and providing business agility without compromising on the quality. Ensuring productivity, quality, consistency, cost effective, reduced cycle time have become a mandate for the teams dealing with modern enterprise software systems. Fluent Interfaces is a powerful technique, which help in taming the programming complexities, reducing... Topics: Fluent Interfaces, Enterprise Software Systems, Application Programmable Interface (API). Domain...
The objective of this work is to propose an image denoising technique and compare it with image denoising using ridgelets. The proposed method uses slantlet transform instead of wavelets in ridgelet transform. Experimental result shows that the proposed method is more effective than ridgelets in noise removal. The proposed method is effective in compressing images while preserving edges. Topics: ridgelet, slantlet transform, image denoising, compression, huffman, edge
Software metrics is applied evaluating and assuring software code quality, it requires a model to convert internal quality attributes to code reliability. High degree of complexity in a component (function, subroutine, object, class etc.) is bad in comparison to a low degree of complexity in a component. Various internal codes attribute which can be used to indirectly assess code quality. In this paper, we analyze the software complexity measures for regression testing which enables the... Topics: Software Complexity, Software Metrics, Regression Testing, Control Flow Metrics1
Data mining helps to find predictive information from large databases. Companies use predictive modeling tools for strategic decision-making. It helps companies to identify and account for the key assumptions that drive business value—enabling good decision making that leads to predictable results. By analyzing the company’s historical information we can anticipate these changes. This paper aims at providing a proposed data mining solution that can be used for automotive market, especially... Topics: Data Mining, Predictive Modeling, Linear regression Analysis, WEKA
In this paper, two different Wavelet based Image Compression techniques are compared. The techniques involved in the comparison process are WDR and ASWDR. The above two techniques are implemented with different types of wavelet codecs. Wavelet difference reduction (WDR) has recently been proposed as a method for efficient embedded image coding. This method retains all of the important features like low complexity, region of interest, embeddedness, and progressive SNR. ASWDR adapts the scanning... Topics: Wavelet Image Compression, WDR, ASWDR
With the explosive growth of international users, distributed information and the number of linguistic resources, accessible throughout the World Wide Web, information retrieval has become crucial for users to find, retrieve and understand relevant information, in any language and form. Cross- Language Information Retrieval (CLIR) is a subfield of Information Retrieval which provides a query in one language and searches document collections in one or many languages but it also has a specific... Topics: Cross Lingual Information Retrieval, Heuristic Method, Text Categorization
In this paper a novel method for image enhancement using PDTDFB (Pyramidal Dual-Tree Directional Filter Bank) and interpolation has been adopted. Generally, in digital images since the different kinds of noise highly affects various image processing techniques it is always better to perform denoising first. Here, first of all the image is decomposed into two different layers namely low pass sub band and high pass sub band after which denoising is being performed on both the layers so as to... Topics: High Resolution, PDTDFB, Denoising, Interpolation, Image Composition.
We present in this paper a very fine method for determining the location of a ground based target when viewed from an Unmanned Aerial Vehicle (UAV). By determining the pixel coordinates on the video frame and by using a range finder the target’s geo-location is determined in the North- East-Down (NED) frame. The contribution of this method is that the target can be localized to within 9m when view from an altitude of 2500m and down to 1m from an altitude of 100m. This method offers a highly... Topic: UAV Applications
A novel example-based process for automated colorization of grayscale images using texture descriptors (ACTD) without any human intervention is proposed. By analyzing a set of sample color images, coherent regions of homogeneous textures are extracted. A multi-channel filtering technique is used for texture-based image segmentation. For each area of interest, state of the art texture descriptors are then computed and stored, along with corresponding color information. These texture descriptors... Topics: Image colorization, Fuzzy C-means clustering, Gabor transform, CBIR
In this paper we present 1D and 2D systolic Distributed Arithmetic (DA) based structures that are designed for the implementation of Finite Impulse Response (FIR) filters. The paper compares the 1D DA based systolic structure with 1D systolic DA based decomposition method. The filters are implemented on a Xilinx Virtex II Pro (XC2VP30) FPGA using HDL and system metrics like Area, Gate Count, Maximum Usable Frequency and Power consumption are estimated for different filter orders and address... Topics: Distributed arithmetic (DA), Field Programmable Gate Arrays (FPGA), Finite Impulse Response (FIR)...
Distributed databases have become the most essential technology for recent business organizations. In most of the cases Distributed Databases are developed in a Bottom- Up approach, fragmentation exists beforehand. The optimum allocation of those fragments is the only way, which can be exploited by the designers to increase the performance, efficiency, reliability and availability of the Distributed Database in the realistic dynamic environment, where the access probabilities of nodes to... Topics: Distributed Database, Fragmentation, Dynamic Fragment Allocation, Distributed Transaction, Local...
DBNorma  is a semi automated database normalization tool, which uses a singly linked list to store a relation and functional dependencies hold on it. This paper describes possible algorithms that can be used to normalize a given relation represented using singly linked list. These algorithms are tested on various relational schemas collected from several research papers/resources and output validated. We have also determined the time required to normalize a given relation in 2NF and 3NF and... Topics: Relation, functional dependency, normalization, normal forms.
This paper gives an overview and analyzes the different existing anti spamming techniques both content based, non content based methods and a combination of the duo. It also suggests that a small change in one of the parameters in the fuzzy string matching method could be useful to produce better results. Topics: email, spam, computer forensics, fuzzy string match
This paper presents a Marathi database and isolated Word recognition system based on Mel-frequency cepstral coefficient (MFCC), and Distance Time Warping (DTW) as features. For the extraction of the feature, Marathi speech database has been designed by using the Computerized Speech Lab. The database consists of the Marathi vowels, isolated words starting with each vowels and simple Marathi sentences. Each word has been repeated three times by the 35 speakers. This paper presents the comparative... Topics: CSL, MFCC, DTW, Spectrogram, Speech Recognition and statistical method
Modern Enterprise Software Systems (MESS) is all about envisioning, developing, managing and evolving enterprise applications to fulfill business requirements. This may entail many challenges like rapidly changing business scenario, increase in complexity, shorter time to market and business agility. In order to deal with this natural evolution, achieving modularity across MESS is essential. In this paper, we describe by way of an example application, some of the common problems encountered... Topic: Enterprise Software
This paper represents a method of computing incremental difference features on the basis of scan line projection and scan converting lines for the lipreading problem on a set of isolated word utterances. These features are affine invariants and found to be effective in identification of similarity between utterances by the speaker in spatial domain. Topics: Incremental Difference Feature, Euclidean distance, Lipreading.
In this paper, the security of Selective Encryptionin RSA based Singular Cubic Curve with Automatic Variable Key (AVK) for some well known attacks are analysed. It is proved that this cryptosystem is more secure than Koyama scheme from which the algorithm has been generated. The proposed cryptographic algorithm makes justified use of Koyama Schemes. Koyama scheme is not semantically secure. The proposed Scheme is efficient and semantically secure public key cryptosystem based on Singular Cubic... Topics: Singular Cubic Curves, Koyama Public Key Cryptosystem (PKC), Automatic Variable Key (AVK), Semantic...
This paper deals with reduction of the transmission power usage in the wireless sensor networks. A system with FEC can provide an objective reliability using less power than a system without FEC. We propose to study LDPC codes to provide reliable communication while saving power in the sensor networks. As shown later, LDPC codes are more energy efficient than those that use BCH codes. Another method to reduce the transmission cost is to compress the correlated data among a number of sensor... Topics: LDPC codes, Distributed Source coding, Source Channel coding, iterative decoding algorithm, layered...
In this paper we introduce a method for part-ofspeech disambiguation of Persian texts, which uses word class probabilities in a relatively small training corpus in order to automatically tag unrestricted Persian texts. The experiment has been carried out in two levels as unigram and bi-gram genotypes disambiguation. Comparing the results gained from the two levels, we show that using immediate right context to which a given word belongs can increase the accuracy rate of the system to a high... Topics: genotype, machine translation, part of speech disambiguation, word class probabilities
This paper presents the speed control of a separately excited DC motor using Fuzzy Logic Control (FLC). The Fuzzy Logic Controller designed in this study applies the required control voltage based on motor speed error (e) and its change (ce). The performance of the driver system was evaluated through digital simulations using Simulink. The simulation results show that the control with FLC outperforms PI control in terms of overshoot, steady state error and rise time. Topics: DC motor, chopper, FLC.
In this work, the analysis and simulation work is proposed for the low-power (reduced subthreshold leakage) and high performance SRAM bit-cells for mobile multimedia applications in deep-sub-micron (DSM) CMOS technology. The sub-threshold leakage analysis of the P3 SRAM cell has been carried out. It has been observed that due to pMOS stacking and full supply body-biasing, there is a reduction of 70% and 86% in sub-threshold leakage current at VDD=0.8V and VDD=0.7V respectively as compared to... Topics: Sub-threshold Leakage, Standby Power, Stacking, Conventional SRAM cell, PP-SRAM, P3-SRAM
In the deregulated electricity market, each generating company has to maximize its own profit by committing suitable generation schedule termed as profit based unit commitment (PBUC). This article proposes a Parallel Particle Swarm Optimization (PPSO) solution to the PBUC problem. This method has better convergence characteristics in obtaining optimum solution. The proposed approach uses a cluster of computers performing parallel operations in a distributed environment for obtaining the PBUC... Topics: deregulated market, profit based unit commitment, particle swarm optimization, distributed...
The optimal allocation of rural energy resources to various energy end users is an important aspect for bridging the energy supply and demand gap in India. It has been observed that allocation should be channelized by multiple criteria. In this paper a multi objective programming model for such an allocation process is presented. A standard model has been applied for rural sector of Malnad region of Shimoga District, Karnataka state. The data used for the analysis is obtained from detailed... Topics: Rural energy resource allocation, multiple objectives, Goal programming, Sustainable development.
In processes of the production chain of carbide inserts, such as unloading or packaging, the conformity test of the insert type is performed manually, which causes a statistic increase of errors due to monotony and fatigue of workers as well as the wide variety of insert types. A measuring method is introduced that automatically inspects the chipformer geometry, the most significant quality feature of inserts. The proposed recognition approach is based on local energy model of feature... Topics: optical measurement, industrial image processing, testing and inspection, local energy, phase...
The conventional line commutated ac-to-dc converters/ inverters have square-shaped line current which contains higher-order harmonics. Moreover, it requires a costly and bulky dc inductor or choke. The line current with the high harmonic contents generates EMI and therefore it causes more heating of the core of distribution or power transformers. Alternatively, PWM based inverters using MOSFET/IGBT switches can be used for the above purpose. However, apart from higher switching losses, the... Topics: grid connected inverter, total harmonic distortion (THD), simulink, line current
Fast delay estimation methods, as compared to simulation techniques, are needed for incremental performance-driven layout synthesis. On-chip inductive and conductive effects are becoming predominant in deep submicron (DSM) interconnects due to increasing clock speeds; circuit complexity and interconnect lengths. Inductance causes noise in the signal waveforms, which can adversely affect the performance of the circuit and signal integrity. Elmore delay-based estimation methods, although... Topics: Moment, Delay calculation, Interconnect, RLCG, VLSI
Variable Frequency Transformer (VFT) is a controllable bi-directional transmission device that can transfer power between asynchronous networks. It avoids both HVDC link and FACTS based power transmission control system. Basically, it is a rotatory transformer whose torque is adjusted in order to control the power flow. In this paper, a simulated model of VFT is used as a controllable bidirectional power transmission device that can control power flow through the connected asynchronous power... Topics: Variable frequency transformer (VFT), MATLAB, Asynchronous power systems, Power flow.
This article presents a 3rd current-mode quadrature oscillator using current controlled current conveyor transconductance amplifier (CCCCTA) and operational transconductance amplifier (OTA) as active element as active elements. The proposed circuit is realized from a noninverting lossless integrator and an inverting second order low-pass filter. The oscillation condition and oscillation frequency can be electronically/orthogonally controlled via input bias currents. The circuit description is... Topics: oscillator, current-mode, CCCCTA, OTA
This article presents a new current-mode multiplier/divider based on MO-CDTA (Multiple output current conveyor transconductance amplifier). The circuit description is very simple, its construction consists of only one MO-CDTA. Without external passive elements, the proposed circuit is then suitable for IC architecture. The PSpice simulation and experimental results are depicted, and agree well with the theoretical anticipation. From simulation results, the maximum power consumption is... Topics: multiplier/divider, current-mode, MO-CDTA
A distribution system is an interface between the bulk power system and the consumers. The radial distribution system is popular among these because of its low cost and simple design. The voltage instability in the power system is characterized by a monotonic voltage drop, which is slow at first and becomes abrupt after some time when the system is unable to meet the increasing power demand. Therefore to overcome these problems capacitors are used. The installation of the shunt capacitors on... Topics: Electrical Distribution Network, Optimal Capacitors Placement, Dimension reducing distribution load...
This paper presents a comprehensive non-linear dynamic model of a solid oxide fuel cell (SOFC) that can be used for transient behaviors studies. The model based on electrochemical and thermal equations, accounts for temperature dynamics and output voltage losses. The relaxation time is strongly related to the transient temperature distribution of the solid oxide fuel cell structure. Therefore, it is in the order of some minutes depending on the design parameters and the operating conditions.... Topics: Fuel cell, FCPP, SOFC
Previous researches [1,2] on Fused Deposition through Electrochemical Discharge (FDED) process have revealed that the periodic instantaneous current wave form (ICWF) is the characteristic of the process and it is significant to maintain the nature of current waveform in order to have a deposition of consistent metallographic properties. The precise control of process parameters is essential for maintaining the current wave form. The standoff distance between electrodes (SOD) is the most... Topics: Fused Deposition by Electrochemical Discharge, Feedback control, Discrete event control system,...
This paper presents an alternative approach for the design of linear phase digital low pass FIR filter using Particle Swarm Optimization with Constriction Factor and Inertia Weight Approach (PSO-CFIWA). FIR filter design is a multimodal optimization problem. The conventional gradient based optimization techniques are not efficient for digital filter design. Given the filter specification to be realized, PSO algorithm generates a set of filter coefficients and tries to meet the ideal frequency... Topics: FIR Filter, PSO, GA, Optimization, Magnitude Response, Convergence, Low Pass Filter
The sensor nodes in a wireless sensor network are normally microcontroller based which are having limited computational capability related to various applications. This paper describes the selection, specification and realization of a wireless sensor node using the field programmable gate array (FPGA) based architecture for an early detection of hazards (e.g fire and gas-leak ) in mines area. The FPGAs in it’s place are more efficient for complex computations in compare to microcontrollers,... Topics: Wireless Sensor Network (WSN), system on programmable chip (SOPC), FPGA
In this paper, a combined approach where low density parity check (LDPC) codes are used to reduce the complexity and power consumption of pulsed orthogonal frequencydivision multiplexing (pulsed-OFDM) ultra-wideband (UWB) systems is described. The proposed system uses LDPC codes to achieve higher code rates without using convolution encoding and puncturing thereby reducing the complexity and power consumption of pulsed-OFDM system. The LDPCpulsed- OFDM system achieves channel capacity with... Topics: Low Density Parity Check (LDPC), pulsed orthogonal frequency-division multiplexing (pulsed-OFDM),...
Using the Mel-frequency cepstral coefficients (MFCC), Human Factor cepstral coefficients (HFCC) and their new parameters derived from log dynamic spectrum and dynamic log spectrum, these features are widely used for speech recognition in various applications. But, speech recognition systems based on these features do not perform efficiently in the noisy conditions, mobile environment and for speech variation between users of different genders and ages. To maximize the recognition rate of... Topics: MFCC, HFCC, HMM, HOAP-2
Modern embedded systems are built around the soft core processors implemented on FPGA. The FPGAs being capable of implementing custom hardware blocks giving the advantage of ASICs, and allowing the implementation of processor platform are resulting in powerful Configurablesystem on chip(C-SoC)platforms. The Microchip’s PIC microcontroller is very widely used microcontroller architecture across various embedded systems. The implementation of such core on FPGA is very much useful in CSOC based... Topics: CPU, RISC, IP Core, IC, MXE, Xilix.
A refined space vector modulation scheme for multilevel inverters, using only the instantaneous sampled reference signals is presented in this paper. The proposed space vector pulse width modulation technique does not require the sector information and look-up tables to select the appropriate switching vectors. The inverter leg switching times are directly obtained from the instantaneous sampled reference signal amplitudes and centers the switching times for the middle space vectors in a... Topics: dual-fed induction motor, space vector PWM, sampled sinusoidal reference signals, triangular...
In this paper, a novel technique is applied to detect fault in the transmission line using wavelet transform. Three phase currents are monitored at both ends of the transmission line using global positioning system synchronizing clock. Wavelet transform, which is very fast and sensitive to noise, is used to extract transients in the line currents for fault detection. Fault index is calculated based on the sum of local and remote end detail coefficients and compared with threshold value to... Topics: Wavelet transform, transmission line faults, power system protection, fault transients,...
Physical layout automation is very important in VLSI’s field. With the advancement of semiconductor technology, VLSI is coming to VDSM (Very Deep Sub Micrometer), and the scale of the random logic IC circuits goes towards million gates. Physical design is the process of determining the physical location of active devices and interconnecting them inside the boundary of the VLSI chip.The earliest and the most critical stage in VLSI layout design is the placement. The background is the rectangle... Topics: Placement problems, Memetic algorithm, wire length minimization, area minimization.
The problem of control associated wind energy conversion systems using horizontal-axis fixed-pitch variable speed low-power, working in the partial load region, consisting in the energy conversion maximization, is approached here under the assumption that the wind turbine model and its parameters are poorly known. Intelligent gradient detection method by using Maximum Power Point Tracking (MPPT) fuzzy control approach is proposed control solution aims at driving the average position of the... Topics: MPPT, wind energy, optimal control, WECS
Power electronics systems are non-linear systems, which consume more reactive power and also the loads they feed are mostly inductive loads which leads to a poor power factor. Various compensation techniques are available to bring the power factor nearer to unity. In this paper, a novel compensator is proposed, where in-phase and quadrature components of the supply current are vector-controlled. Implementation of this compensator in a power electronic system operating with a very poor power... Topics: Total Harmonic Distortion, Vector Control, Compensator, Switching, Power Electronic Converters
These paper presents the dynamic operation of a novel control scheme for Static Synchronous Compensator (STATCOM) based on a new full model comprising a 48-pulse Gate Turn-Off (GTO) thyristor voltage source converter for combined reactive power compensation and voltage stabilization of the electric grid network. The novel controller for the STATCOM presented in this paper is based on a decoupled strategy using the direct and quadrature components of the STATCOM current. The complete digital... Topics: 48-pulse GTO thyristor model STATCOM, novel decoupled control strategy, reactive compensation,...
Devices such as power electronics converters, inject harmonic currents in the AC system and increase overall reactive power demanded by the equivalent loads are presents non-linear characteristics. Also, the number of sensitive loads that require ideal sinusoidal supply voltages for their proper operation has increased. In order to keep power quality under limits proposed by standards, it is necessary to include some sort of compensation. The aim of this paper is to present a unified power... Topics: unified power quality conditioner, fuzzy logic controller, powewr quality, dc link voltage
ultralow power consumption requirement of low throughput applications needs to operate circuits in subthreshold region where subthreshold leakage current is used as active current for necessary computations. This paper investigates the impact of interconnect drivers on digital circuit performance in subthreshold region. In particular, we have investigates the performance of Si-MOSFET and CNFETs at 32nm deep submicron technology node. Performance Analysis is carried out for different... Topics: Subthreshold, Ultra-low power, CNFET, Monte- Carlo analysis.
Due to the increasing interest on renewable sources in recent times, the studies on integration of distributed generation to the power grid have rapidly increased. In order to minimize line losses of power systems, it is crucially important to define the location of local generation to be placed. Proper location of DGs in power systems is important for obtaining their maximum potential benefits. This paper presents analytical approaches to determine the optimal location to place a DG on radial... Topics: Analytical approach, distributed generation, radial systems, optimal placement, power loss
This paper proposes a genetic algorithm optimization technique for optimal placement of distributed generation in a radial distribution system to minimize the total power loss and to improve the voltage sag performance. Load flow algorithm and three phase short circuit analysis are combined appropriately with GA, till access to acceptable results of this operation. The suggested method is programmed under MATLAB software. The implementation of the algorithm is illustrated on a 34-node radial... Topics: Distributed Generation, Line Loss, Voltage Sag, Genetic Algorithm, and Radial Distribution network